PIA00356: Ganymede's Northern Hemisphere
 Target Name:  Ganymede
 Is a satellite of:  Jupiter
 Mission:  Voyager
 Spacecraft:  Voyager 2
 Instrument:  VG ISS - Narrow Angle
 Product Size:  740 x 730 pixels (w x h)
 Produced By:  JPL
 Producer ID:  P21761
 Addition Date:  1999-02-06
 Primary Data Set:  Voyager EDRs
 Full-Res TIFF:  PIA00356.tif (1.381 MB)
 Full-Res JPEG:  PIA00356.jpg (82.46 kB)

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Original Caption Released with Image:

This color reconstruction of part of the northern hemisphere of Ganymede was made from pictures taken at a range of 313,000 kilometers (194,000 miles). The scene is approximately 1,300 kilometers (806 miles) across. It shows part of dark, densely cratered block which is bound on the south by lighter, and less cratered, grooved terrain. The dark blocks are believed to be the oldest parts of Ganymede's surface. Numerous craters are visible, many with central peaks. The large bright circular features have little relief and are probably the remnants of old, large craters that have been annealed by flow of the icy near-surface material. The closely-spaced arcuate, linear features are probably analogous to similar features on Ganymede which surround a large impact basin. The linear features here may indicate the former presence of a large impact basin to the southwest.

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